I have a 76 and wondered if these alternators are up to the task of running amps or is it more likely my grounds. The audio sounds ok when the engine isnt running and is ok for about 15 minutes running, then gets a static sound. No whining, but more like a bad radio signal. RCA's run down the opposite side of the car from the speaker wires. Only one amp is hooked up right now. It's an alpine 4 channel 100watt rms x4. 2 guage runs to a distribution block and then 2 4 guage runs to the trunk. Block is at the firewall. I posted this in electronics section a few days ago, but things seem pretty slow there. No replies. Thanks for any ideas.